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a fost răspuns

Afl numerele necunoscute.a+124÷84=230÷65 39÷280-b=20÷80 c-320÷60=425÷40 57÷620-d=40÷350

Răspuns :

a + 124 × 84 = 230 × 65
a + 10416 = 14950
a = 14950-10416
a= 4534

39×280-b=20×80
9920-b= 1600
b = 9920-1600
b= 8320

c-320×60=425×40
c-19200=17000
c=19200+17000
c=36200

57×620-d=40×350
35340-d=14000
d= 35340-14000
d= 21340
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